<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>

        #drop-area {
            width: 200px;
            height: 200px;
            background-color: bisque;
        }

        img {
            width: 200px;
        }
    </style>

</head>
<body>
<div id="drop-area">
    Drag image in
</div>

<script src="main.js"></script>
</body>
</html>